Volume 67, Issue 1, March and April 2023, Pages 51-67
Hazem Mahdy; Hany Elnagar; Helmy Sakr
Volume 67, Issue 1, March and April 2023, Pages 68-83
ibrahim issa; Ahmed Hammam; Helmy Sakr; Rezk Ayyad
Volume 52, Issue 2, September 2015, Pages 82-100
Helmy Sakr